...the only analysis we have proving that -There are actually intentional errors-They might not be all handled as well by modern CD ROM players as by hifi players because there are a few with contiguous samples.-They prevent CRC comparisons between drives, like in accuraterip.-They are repeatable and thus not detected with non-C2 secure modes, and not corrected by EAC once detected bu C2.-They are not generated in special places "so as to be inaudible".